Signments



i to plant life, wh

Patented Sept. 6, 1932 Ann mnsm: AS- A CORPORATION or DELA- INSEQTICIDE No Drawing.

My invention relates to compounds which have heretofore not been known to possess insecticidal properties but which do have t ese powers in a very marked degree, with the. added advantage of being non-injurious en used under certain conditlons, as hereinafter pointed out.

atty acids are known to certain derivatives or acids,which are relatively non-injurious to plant life under certain conditions and prescriptions of use, yet are powerfully insecticidal. It may be reasonably inferred that the agent in the fatty acid which is destructive of plant tissue or which burns the plants, is the acidhydrogen of the fatty acids, and this inference seems by the fact that whenthis acid hydrogen radical is replaced a hydrocarbon radical e injurious effects of the compound are removed or largely eliminated without however diminishing its insecticidal value. v

have discovered that the esters of the fatty acids derived from animal or vegetable fats or oils, d, cocoanut, castor, linseed and other vegetable oils, and fish oil, whale oil, tallow and other animal fats are and non-injurious to lnsecticidal mile the butyl-acety -esters of but 1- ds are insecticidal, but possess extraordinary emulsifyin owers, as set out in my application for mulsi er and insecticide, filed October 28, #29, Serial Number 403,128. The inecause owing to the hig Application filed November 11, 1929. .Serial No. 406,534.

one to three parts in one h Water, but on account of their is found to be economical to dilute them first with petroleum oil, as set forth later.

as insecticides, I have found that the butyl-ester of ricinoleic acid is preferable for th armored scale usually found on citrus trees. or instance, if a mixture consisting of two parts by volume of butyl-ricinoleate and one part of butyl-acetyl-ricinoleate and ninety seven parts by volume of water be thoroughly mixed and agitated and then sprayed to the red scale on citrus, perhaps the most difficult of all the scale insects to kill, a complete kill has consistently resulted, without any injurious veffects on the trees. 7

he butyl-esters of the fatty acids may rendered capable of mixing with Water form a milky fluid with the aid sifier, of whic there are many. however, butyLacetyI-ester of recinoleic acid or its homologues, more fully d' my said above mentioned hen mixed with water and agitated, producing a very powerful (emulsified) insecticide. These butyl-esters and butyl-acetyl-esters of the fatty acids are readily soluble in petroleum oil to the degree ester insecticide,

use, however, I

the ester will be suflicient. or the purpose of dilution, I prefer to use a liquid petroleum distillate and may emplo different fractlons of varying degrees of re g to the pest to be treated and, the circumstances governin apfor example use a liquid an oil of the kerosene group, With a viscosity not to exceed seconds Sayboldt, and a saturation percentage not exceeding 85, though the question of not so important in this class of oils as in the lubricating oils. The addition 0 t ese esters to petroleum oils permits the e extermination of the use of much lighter fractions, hence reducing the hazard of injury. nv act I have reatedly sprayed a mixture consisting of the butyl-esters and butyl-acetyl-esters an raw kerosene in substantially the proportions given on the tender foliage of citrus without injury to either the leaves or fruit thereof.

The following is exemplary of an insecticidal, emulsifiable compound'involving any of the esters of the fatty acids derived from animal or vegetable fats or oils dissolved in a liquid petroleum hydrocarbon.

Butyl-ester (Butyl-ricinoleate) 10%. Butyl-actyl-ester (Butyl-acetyl-ricinoleate) 2%. Diluted with kerosene 88%. The compound thus constituted and prepared is ready for immediate use or, not being subject to deterioration, corruption, or

taint, may be kept indefinitely in a close container. When this compound is vigorously agitated with water, an emulsion results, and this emulsion may be applied at the dilution required by the nature of the pest that it is desired to kill. If a more stable emulsion be requ'red, the quantity of the emulsifier should be increased.

Since however, the discovery that the esters, and especially the butyl-esters of the fatty acids derived from animal or vegetable fats or oils, are potently insecticidal, is the essence of this invention, I would have it understood that the use of any emulsifier, where such is desirable, as an ingredient of an insecticidal compound consisting of an esterof a fatty acid whether dissolved in a petroleum oil or not, is included in this disclosure, as a part of my invention.

What I claim, is:

1. An insecticide comprising butyl-ricinoleate and an emulsifier. v

2. An insecticide which comprises a liquid petroleum distillate, an alkyl ester of a higher fatty acid soluble therein, and an emulsifying agent.

3. An insecticide which comprises a liquid petroleum distillate, an alkyl ester of a higher fatty acide soluble therein, and a water-mineral oil emulsifying agent.

4. An insecticide which comprises liquid petroleum distillates, alkyl esters of fatty acids derived from substances composing the group: animal fats, vegetable fats, animal oils, and vegetable oils, said esters being soluble in the hydrocarbons, and an emulsifying agent.

5. An insecticide which comprises alkyl esters of fatty acids derived from substances composing the group: animal fats, vegetable fats, animal oils, and vegetable oils.

6. An insecticide .zwhich comprises butyl esters of fatty acidsderived from substances composing the group: animal fats, vegetable fats, ammal oils, and vegetable oils.

7 An insecticide esters of fatty acids d g the group fats, animal sifier soluble in s comprises alkyl om substances ats, vegetable table oils, and an emulcomprises esters of tances composvegetable fats, mulsifier soluderived fro ing the group: animal oils, vege ble in said esters,

ch comprises 1 the kerosene group, ds derived from s b etroleum dist alkyl esters stances composing the animal oils,

soluble in the vegetable fats, said esters being tillates, and-an em getable oils, petroleum disulsifying agent.

and a liqui 11. An insect ricinoleate, liquid petro 12. An insec ricinoleate, liquid petro 13. An insec petroleum dis fatty acid deri the group animal fats, veg oils, and veget ble in the said 1 14. An insectici alkyl ester of a stances composing vegetable fats,

15. An insec of a monohyd rived from sub animal fats, vegetable oils.

In testimony whereof I have set my HUGH emulsifier, disso leum distillate.

ticide which comprises butyl tyl acetyl ricinol leum distillate.

comprises a liquid (1 an alkyl ester of a ubstanc'es composing etable fats, animal d ester being solu-' uid petroleum hich comp d derived from subable oils, sai

d vegetable oils. ticide which c d a fatty acid destances composing the group: 

